Improvement iis



"FFICE ROBERT SANDERSON, OF CLEVELAND, OHIO.

IMPROVEMENT IN BAKERS OVENS.

Specification forming part of Letters Patent No. 120,901, dated November14, 1871.

tions. Fig. 5 is a plan view with the. top removed. Fig. 6 is alongitudinal vertical section.

Like letters of reference refer to like parts in the different views. y

The nature of this invention relates to a bakers oven of peculiarconstruction. rEhe articles to be baked are placed upon a series ofrevolving plates at one end of the oven, and discharged when baked atthe other, substantially in the manner as follows, viz.:

In Fig. 3, A A represent the side walls of the oven, of which B is thearch or crown. O is the furnace or fire-place, whereby the bottom orlowcr part of the oven is heated. D is also a furnace, whereby the upperpart of the oven is heated. The construction of the furnace is or maybein the ordinary way for the use of anthracite coal. C and D aregrate-bars. Within said walls are secured stays E, in each end of whichis journaled a shaft, indicated by the dotted lines a, Figs. et and 5.On each end of the front shaft is secured a plain smooth wheel, F, Fig.whereas on each end of the shaft, at the rear end, is securedasprocket-wheel, G, Fig. 6, over which wheels runs an endless chain.Said chain consists of a series of plates, I, eX- tending across theoven. The plates are connected to each other by means of lugs b bdepending fronl the under-side edge ofeach of the plates, and which arcconnected to eachother by links J. Said links and plates form a kind ofendless chain or succession of plates, which pass around over the wheelsF G, the chain being carried by the sprocket-Wheel G, in the lugs ofwhich the links J engage, as shown in Fig. 6. Motion is obtained to thechain of plates by means of the worm and wheel K L, Figs. l and 2, whichdrive the shaft of the sprocket-wheel G, said worm and wheelbeingactuated by any appropriate power. M N, Figs. 5 and 6, are

aprons, the purpose of which will presently be shown.

The practical operation of the above-described oven is as follows, viz.:The oven is heated as aforesaid by the furnaces C D, the lower part bythe furnace C and the upper part by the furnace D. The bread, crackers,or other articles to be baked are laid upon the plate I', the firsthorizontal one in the upper range, which, as the series of platesrevolves, is carried back into the oven under the apron M. The timerequired to move the plate I into and back to the rear end of the ovenis sufficient to bake the articles thereon. The speed of the platesbeing made greater or less, according to the time required to bake thebread or other article, these, when baked, slide off from the plate atthe rear end as the plate passes down over the wheel on its return tothe front end of the oven, to be again loaded with articles to be baked.The purpose of the guard-plates M N referred to is to prevent too muchheat from being thrown upon the plates and `baking articles as they passthe fur-A naces, but which is thereby distributed more equally over theoven, so that the crackers or other articles are less liable to beburned. The gas, steam, and smoke that may be generated in the ovenduring the process of baking escapes through the vents' O in the crownof the oven, and may be conducted into the chimney and thereby preventedfrom filling the room.

The advantage of having two furnaces, one below and the other near thetop, is that a more uniform heat is obtained to the oven than can bedone by having but one furnace, and that at or near the bottom, in theusual way.

By having a furnace near the ,top the upper side of the baking articlesreceives a more direct heat, instead of a reflected one from the arch ofthe oven; hence the articles are more quickly baked, and with greateruniformity of color.

What I claim as my improvement, and desire to secure by Letters Patent,is-

l. The arrangement and combination of the plates I, wheels F G, Worinand pinion K L, guard-plates M N, and oven A, substantially in themanner described and for the purpose set forth.

2. The two furnaces C D, arranged in relation to the bottom and side ofthe oven A in the manner substantially as described, andfor the purposespecified.

v d ROBERT SANDERSON.

Witnesses:

J. H. BURRIDGE,

D. L. HUMPHREY.

